From 0ccb86a690c52d047b6cafa0f7f99805bf6eeb4e Mon Sep 17 00:00:00 2001 From: Ian Abbott Date: Wed, 13 Sep 2023 18:07:04 +0100 Subject: comedi: 8255_pci: Conditionally remove devices that use port I/O In a future patch, the port I/O functions (`inb()`, `outb()`, and friends will only be declared in the `HAS_IOPORT` configuration option is enabled. The 8255_pci module supports PCI digital I/O devices from various manufacturers that consist of one or more 8255 Programmable Peripheral Interface chips (or equivalent hardware) to provide their digital I/O ports. Some of the devices use port I/O and some only use memory-mapped I/O. Conditionally compile in support for the devices that need port I/O if and only if the `CONFIG_HAS_IOPORT` macro is defined. Change `pci_8255_auto_attach()` to return an error if the device actually requires port I/O (based on the PCI BAR resource flags) but the `HAS_IOPORT` configuration is not enabled. Cc: Arnd Bergmann Cc: Niklas Schnelle Signed-off-by: Ian Abbott Link: https://lore.kernel.org/r/20230913170712.111719-6-abbotti@mev.co.uk Signed-off-by: Greg Kroah-Hartman --- drivers/comedi/drivers/8255_pci.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'drivers/comedi') diff --git a/drivers/comedi/drivers/8255_pci.c b/drivers/comedi/drivers/8255_pci.c index 0fec048e3a53..9ad52e9f5427 100644 --- a/drivers/comedi/drivers/8255_pci.c +++ b/drivers/comedi/drivers/8255_pci.c @@ -57,6 +57,7 @@ #include enum pci_8255_boardid { +#ifdef CONFIG_HAS_IOPORT BOARD_ADLINK_PCI7224, BOARD_ADLINK_PCI7248, BOARD_ADLINK_PCI7296, @@ -65,6 +66,7 @@ enum pci_8255_boardid { BOARD_CB_PCIDIO48H_OLD, BOARD_CB_PCIDIO48H_NEW, BOARD_CB_PCIDIO96H, +#endif /* CONFIG_HAS_IOPORT */ BOARD_NI_PCIDIO96, BOARD_NI_PCIDIO96B, BOARD_NI_PXI6508, @@ -82,6 +84,7 @@ struct pci_8255_boardinfo { }; static const struct pci_8255_boardinfo pci_8255_boards[] = { +#ifdef CONFIG_HAS_IOPORT [BOARD_ADLINK_PCI7224] = { .name = "adl_pci-7224", .dio_badr = 2, @@ -122,6 +125,7 @@ static const struct pci_8255_boardinfo pci_8255_boards[] = { .dio_badr = 2, .n_8255 = 4, }, +#endif /* CONFIG_HAS_IOPORT */ [BOARD_NI_PCIDIO96] = { .name = "ni_pci-dio-96", .dio_badr = 1, @@ -219,8 +223,11 @@ static int pci_8255_auto_attach(struct comedi_device *dev, dev->mmio = pci_ioremap_bar(pcidev, board->dio_badr); if (!dev->mmio) return -ENOMEM; - } else { + } else if (IS_ENABLED(CONFIG_HAS_IOPORT)) { dev->iobase = pci_resource_start(pcidev, board->dio_badr); + } else { + dev_err(dev->class_dev, "error! need I/O port support\n"); + return -ENXIO; } /* @@ -259,6 +266,7 @@ static int pci_8255_pci_probe(struct pci_dev *dev, } static const struct pci_device_id pci_8255_pci_table[] = { +#ifdef CONFIG_HAS_IOPORT { PCI_VDEVICE(ADLINK, 0x7224), BOARD_ADLINK_PCI7224 }, { PCI_VDEVICE(ADLINK, 0x7248), BOARD_ADLINK_PCI7248 }, { PCI_VDEVICE(ADLINK, 0x7296), BOARD_ADLINK_PCI7296 }, @@ -269,6 +277,7 @@ static const struct pci_device_id pci_8255_pci_table[] = { { PCI_DEVICE_SUB(PCI_VENDOR_ID_CB, 0x000b, PCI_VENDOR_ID_CB, 0x000b), .driver_data = BOARD_CB_PCIDIO48H_NEW }, { PCI_VDEVICE(CB, 0x0017), BOARD_CB_PCIDIO96H }, +#endif /* CONFIG_HAS_IOPORT */ { PCI_VDEVICE(NI, 0x0160), BOARD_NI_PCIDIO96 }, { PCI_VDEVICE(NI, 0x1630), BOARD_NI_PCIDIO96B }, { PCI_VDEVICE(NI, 0x13c0), BOARD_NI_PXI6508 }, -- cgit v1.2.3